George d



(No Model.)

G. D. MURDOOH.

BOLT.

' No. 380,813. Patented Apr. 10, 1888.

INVBNTOR WITNESSES-8:

ATTORNEYS.

UNITED STATES PATENT Fries,

GEORGE D. MURDOGH, OF BROOKLYN, NEWV YORK.

BOLT.

QPECIFICATION forming part of Letters Patent No. 380,813, dated April 10, 1888. Application filed June 23, 1887. Serial No. 242.280. (No model.)

To all whom itmay concern.-

Be it known that 1, GEORGE D. MURDocH, of the city of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Bolt, of which the following is a full, clear, and exact description.

My invention relates to an improvement in bolts or separators; and its object is to clean bone-black, sulphur, coffee, or any dry matter required to be freed from dust, and to clean such material in an expeditious, simple, and

effective manner.

The invention consists in the construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation of the device, and Fig. 2 is a partial central and vertical sec tion. Fig. 3 is a horizontal section on line as w of Fig. 1.

In carrying out the invention a cylindrical body, A, is employed, having preferably a conical top, a, and a similar bottom, a. At the top of the casing or body a hopper, B, is provided, through which the material to be cleaned is entered, and in the bottom of the hopper a slide, 11'', is arranged to regulate the amount of material passing into the casing.

Centrally and vertically within the casing a small cylinder, B, is supported, extending from within the conical top a, immediately below the hopper, to the intersection of the cylindrical body with the conical bottom. (Shown in dotted lines, Figs. 1 and 2.)

, The cylinder B, which is adapted to constitute an air-flue, is constructed from wire gauze or other open material, being provided at the top with a solid conical cap, b. VAn aperture is formed in one side of the cylinder B, above the center, in which aperture a pipe is entered, connected with any pressure-blower, and opposite said pipe and surrounding the same a plate, I)", is attached to the screen of the cylinder, whereby the air entering through said pipe strikes the plate. I) and is disseminated throughout the cylinder, instead of being concentrated at one point.

The mouth of the pipe 1) within the cylinder B is provided with a vertical semicircular partition, and one end of a tube, 0, is made to pass through the partition into the air-supply pipe 5, the other end of the tube being projected downward through the cylinder B to a point just above an outlet-pipe, G, attached at the apex of the conical bottom.

A second gauze cylinder, D, is provided, surrounding the aforesaid cylinder B and of greater diameter than the same, the space intervening the two cylinders being filled with coils of stout wire D, which coils act in the capacity of deflecting-rods to break up the material should it enter the cylinder D in a mass.

The cylinder D is attached at the top to the upper cone, a, below the cap of the inner cylinder, as shown in Fig. 2, and is made to extend downward below the union of the lower cone, a, and the cylinder A, being provided at the base with an outlet-pipe, E, which pipe is projected through said lower conical head, a,

- as shown in Fig. 1.

The coils of wire D are preferably made in two sections-namely, an upper and lower section-one above the plate b and the other below the same, as illustrated in Fig. 2.

The air-cylinder B, the conducting-cylinder D, and the deflecting spirals D may be secured to one another and supported in the casing A in any well-known or approved manner.

In operation the material to be cleaned-for instance, bone-blackis placed in the hopper B and fed down into the cylinder D, guided thereto and distributed around upon the deflecting spirals D by the cap b Meanwhile, by means of a suitable blower, a constant supply of air is forced into the cylinder B, which air,striking the plate I)", is distributed throughout said inner cylinder, and the air, passing with great force through the sides of the cylinder B in contact with the spiral rods D, drives the dust from the material as it drops from coil to coil of the spirals through the sides of the conducting-cylinder D into the casing A. The dust in said casing, naturally falling to the bottominto the outlet-pipe0,is driven through said pipe by means of the air forced through the tube a into any desired receptacle. The

IOO

clean material, after passing over the spirals, drops into the pipe E, and by means of said pipe is conveyed to any convenient point.

Doors H H are provided in the casing for use in cleaning the same.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a bolt for cleaning dry material, the combination, with a casing provided with an inlet and outlet, of an air-inlet pipe, a perforated air-chamber, an inclosing perforated conducting-chamber provided with an inlet and outlet, and a series of deflecting-rods intervening the said chambers, substantially as shown and described.

2. In a bolt for cleaning dry material, the combination, with a casing provided with an inlet and outlet, of a perforated air chamber inclosed at top and bottom, an air-supply pipe leading into said chamber, and a plate surrounding the air-chamber opposite said pipe,

an inclosing perforated chamber provided with an inlet and outlet, and a series of deflectingrods intervening said chambers, substantially as shown and described.

3. In a bolt for cleaning dry material, the combination, with a casing having a conical top and bottom, an inlet at said top and an outlet at said bottom, of aperforated air-chamber inclosed at top and bottom, an air-supply pipe leading into said chamber, a tube leading from said pipe to the casing-outlet, and a plate surrounding said air-chamber opposite said air-supply pipe, an inclosing perforated conducting-chamber having an inlet and outlet surrounding the air-chamber, and a series of battle-rods intervening the two chambers, substantially as shown and described.

GEORGE D. MURDOGH.

Witnesses:

J. F. ACKER, J15, EDGAR TATE. 

